Resonance model for #pi#N scattering and #eta#-meson production in the S_1_1 channel

A model for #pi#N scattering and #eta#-meson production in the S_1_1 channel is presented. The model includes #pi#N-scattering Born terms as well as the N* resonances S_1_1(1535) and S_1_1(1610). The T-matrix is computed in the K-matrix approximation. The parameters of the model are determined by fitting the elastic #pi#N-scattering T-matrix to empirical data. We find an excellent fit for all energies up to #sq root#s=1.75 GeV. Furthermore, a good description of the cross section for #pi#"-+p#->##eta#+n is obtained without further adjustment of parameters. (orig.)SIGLEAvailable from TIB Hannover: RO 801(94-45) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman